|
Packit |
6c4009 |
/*
|
|
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6c4009 |
* ++Copyright++ 1985, 1988, 1993
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Packit |
6c4009 |
* -
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|
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6c4009 |
* Copyright (c) 1985, 1988, 1993
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6c4009 |
* The Regents of the University of California. All rights reserved.
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|
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6c4009 |
*
|
|
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6c4009 |
* Redistribution and use in source and binary forms, with or without
|
|
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6c4009 |
* modification, are permitted provided that the following conditions
|
|
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6c4009 |
* are met:
|
|
Packit |
6c4009 |
* 1. Redistributions of source code must retain the above copyright
|
|
Packit |
6c4009 |
* notice, this list of conditions and the following disclaimer.
|
|
Packit |
6c4009 |
* 2. Redistributions in binary form must reproduce the above copyright
|
|
Packit |
6c4009 |
* notice, this list of conditions and the following disclaimer in the
|
|
Packit |
6c4009 |
* documentation and/or other materials provided with the distribution.
|
|
Packit |
6c4009 |
* 4. Neither the name of the University nor the names of its contributors
|
|
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6c4009 |
* may be used to endorse or promote products derived from this software
|
|
Packit |
6c4009 |
* without specific prior written permission.
|
|
Packit |
6c4009 |
*
|
|
Packit |
6c4009 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
Packit |
6c4009 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
Packit |
6c4009 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
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6c4009 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
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6c4009 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
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6c4009 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
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6c4009 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
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6c4009 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
Packit |
6c4009 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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|
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6c4009 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
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6c4009 |
* SUCH DAMAGE.
|
|
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6c4009 |
* -
|
|
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6c4009 |
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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6c4009 |
*
|
|
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6c4009 |
* Permission to use, copy, modify, and distribute this software for any
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|
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6c4009 |
* purpose with or without fee is hereby granted, provided that the above
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|
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6c4009 |
* copyright notice and this permission notice appear in all copies, and that
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|
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6c4009 |
* the name of Digital Equipment Corporation not be used in advertising or
|
|
Packit |
6c4009 |
* publicity pertaining to distribution of the document or software without
|
|
Packit |
6c4009 |
* specific, written prior permission.
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6c4009 |
*
|
|
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6c4009 |
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
|
|
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6c4009 |
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
|
|
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6c4009 |
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
|
|
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6c4009 |
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
|
|
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6c4009 |
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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|
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6c4009 |
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
|
|
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6c4009 |
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
|
|
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6c4009 |
* SOFTWARE.
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Packit |
6c4009 |
* -
|
|
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6c4009 |
* --Copyright--
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|
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6c4009 |
*/
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|
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6c4009 |
|
|
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6c4009 |
/* XXX This file is not used by any of the resolver functions implemented by
|
|
Packit |
6c4009 |
glibc (i.e. get*info and gethostby*). It cannot be removed however because
|
|
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6c4009 |
it exports symbols in the libresolv ABI. The file is not maintained any
|
|
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6c4009 |
more, nor are these functions. */
|
|
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6c4009 |
|
|
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6c4009 |
#include <shlib-compat.h>
|
|
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6c4009 |
#if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_25)
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# include <sys/types.h>
|
|
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6c4009 |
# include <sys/param.h>
|
|
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6c4009 |
# include <sys/socket.h>
|
|
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6c4009 |
# include <netinet/in.h>
|
|
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6c4009 |
# include <arpa/inet.h>
|
|
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6c4009 |
# include <arpa/nameser.h>
|
|
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6c4009 |
|
|
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6c4009 |
# include <stdio.h>
|
|
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6c4009 |
# include <netdb.h>
|
|
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6c4009 |
# include <resolv/resolv-internal.h>
|
|
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6c4009 |
# include <resolv/resolv_context.h>
|
|
Packit |
6c4009 |
# include <ctype.h>
|
|
Packit |
6c4009 |
# include <errno.h>
|
|
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6c4009 |
# include <stdlib.h>
|
|
Packit |
6c4009 |
# include <string.h>
|
|
Packit |
6c4009 |
|
|
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6c4009 |
# define MAXALIASES 35
|
|
Packit |
6c4009 |
# define MAXADDRS 35
|
|
Packit |
6c4009 |
|
|
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6c4009 |
static char *h_addr_ptrs[MAXADDRS + 1];
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static struct hostent host;
|
|
Packit |
6c4009 |
static char *host_aliases[MAXALIASES];
|
|
Packit |
6c4009 |
static char hostbuf[8*1024];
|
|
Packit |
6c4009 |
static u_char host_addr[16]; /* IPv4 or IPv6 */
|
|
Packit |
6c4009 |
static FILE *hostf = NULL;
|
|
Packit |
6c4009 |
static int stayopen = 0;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static struct hostent *res_gethostbyname2_context (struct resolv_context *,
|
|
Packit |
6c4009 |
const char *name, int af);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void map_v4v6_address (const char *src, char *dst) __THROW;
|
|
Packit |
6c4009 |
static void map_v4v6_hostent (struct hostent *hp, char **bp, int *len) __THROW;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
extern void addrsort (char **, int) __THROW;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# if PACKETSZ > 65536
|
|
Packit |
6c4009 |
# define MAXPACKET PACKETSZ
|
|
Packit |
6c4009 |
# else
|
|
Packit |
6c4009 |
# define MAXPACKET 65536
|
|
Packit |
6c4009 |
# endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* As per RFC 1034 and 1035 a host name cannot exceed 255 octets in length. */
|
|
Packit |
6c4009 |
# ifdef MAXHOSTNAMELEN
|
|
Packit |
6c4009 |
# undef MAXHOSTNAMELEN
|
|
Packit |
6c4009 |
# endif
|
|
Packit |
6c4009 |
# define MAXHOSTNAMELEN 256
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
typedef union {
|
|
Packit |
6c4009 |
HEADER hdr;
|
|
Packit |
6c4009 |
u_char buf[MAXPACKET];
|
|
Packit |
6c4009 |
} querybuf;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
typedef union {
|
|
Packit |
6c4009 |
int32_t al;
|
|
Packit |
6c4009 |
char ac;
|
|
Packit |
6c4009 |
} align;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# ifndef h_errno
|
|
Packit |
6c4009 |
extern int h_errno;
|
|
Packit |
6c4009 |
# endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# ifdef DEBUG
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
Dprintf (char *msg, int num)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (_res.options & RES_DEBUG) {
|
|
Packit |
6c4009 |
int save = errno;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
printf(msg, num);
|
|
Packit |
6c4009 |
__set_errno (save);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
# else
|
|
Packit |
6c4009 |
# define Dprintf(msg, num) /*nada*/
|
|
Packit |
6c4009 |
# endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# define BOUNDED_INCR(x) \
|
|
Packit |
6c4009 |
do { \
|
|
Packit |
6c4009 |
cp += x; \
|
|
Packit |
6c4009 |
if (cp > eom) { \
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY); \
|
|
Packit |
6c4009 |
return (NULL); \
|
|
Packit |
6c4009 |
} \
|
|
Packit |
6c4009 |
} while (0)
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
# define BOUNDS_CHECK(ptr, count) \
|
|
Packit |
6c4009 |
do { \
|
|
Packit |
6c4009 |
if ((ptr) + (count) > eom) { \
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY); \
|
|
Packit |
6c4009 |
return (NULL); \
|
|
Packit |
6c4009 |
} \
|
|
Packit |
6c4009 |
} while (0)
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static struct hostent *
|
|
Packit |
6c4009 |
getanswer (const querybuf *answer, int anslen, const char *qname, int qtype)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
const HEADER *hp;
|
|
Packit |
6c4009 |
const u_char *cp;
|
|
Packit |
6c4009 |
int n;
|
|
Packit |
6c4009 |
const u_char *eom, *erdata;
|
|
Packit |
6c4009 |
char *bp, **ap, **hap;
|
|
Packit |
6c4009 |
int type, class, buflen, ancount, qdcount;
|
|
Packit |
6c4009 |
int haveanswer, had_error;
|
|
Packit |
6c4009 |
int toobig = 0;
|
|
Packit |
6c4009 |
char tbuf[MAXDNAME];
|
|
Packit |
6c4009 |
const char *tname;
|
|
Packit |
6c4009 |
int (*name_ok) (const char *);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
tname = qname;
|
|
Packit |
6c4009 |
host.h_name = NULL;
|
|
Packit |
6c4009 |
eom = answer->buf + anslen;
|
|
Packit |
6c4009 |
switch (qtype) {
|
|
Packit |
6c4009 |
case T_A:
|
|
Packit |
6c4009 |
case T_AAAA:
|
|
Packit |
6c4009 |
name_ok = res_hnok;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
case T_PTR:
|
|
Packit |
6c4009 |
name_ok = res_dnok;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
default:
|
|
Packit |
6c4009 |
return (NULL); /* XXX should be abort(); */
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* find first satisfactory answer
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
hp = &answer->hdr;
|
|
Packit |
6c4009 |
ancount = ntohs(hp->ancount);
|
|
Packit |
6c4009 |
qdcount = ntohs(hp->qdcount);
|
|
Packit |
6c4009 |
bp = hostbuf;
|
|
Packit |
6c4009 |
buflen = sizeof hostbuf;
|
|
Packit |
6c4009 |
cp = answer->buf;
|
|
Packit |
6c4009 |
BOUNDED_INCR(HFIXEDSZ);
|
|
Packit |
6c4009 |
if (qdcount != 1) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
n = dn_expand(answer->buf, eom, cp, bp, buflen);
|
|
Packit |
6c4009 |
if ((n < 0) || !(*name_ok)(bp)) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
BOUNDED_INCR(n + QFIXEDSZ);
|
|
Packit |
6c4009 |
if (qtype == T_A || qtype == T_AAAA) {
|
|
Packit |
6c4009 |
/* res_send() has already verified that the query name is the
|
|
Packit |
6c4009 |
* same as the one we sent; this just gets the expanded name
|
|
Packit |
6c4009 |
* (i.e., with the succeeding search-domain tacked on).
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
n = strlen(bp) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n >= MAXHOSTNAMELEN) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
host.h_name = bp;
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
/* The qname can be abbreviated, but h_name is now absolute. */
|
|
Packit |
6c4009 |
qname = host.h_name;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
ap = host_aliases;
|
|
Packit |
6c4009 |
*ap = NULL;
|
|
Packit |
6c4009 |
host.h_aliases = host_aliases;
|
|
Packit |
6c4009 |
hap = h_addr_ptrs;
|
|
Packit |
6c4009 |
*hap = NULL;
|
|
Packit |
6c4009 |
host.h_addr_list = h_addr_ptrs;
|
|
Packit |
6c4009 |
haveanswer = 0;
|
|
Packit |
6c4009 |
had_error = 0;
|
|
Packit |
6c4009 |
while (ancount-- > 0 && cp < eom && !had_error) {
|
|
Packit |
6c4009 |
n = dn_expand(answer->buf, eom, cp, bp, buflen);
|
|
Packit |
6c4009 |
if ((n < 0) || !(*name_ok)(bp)) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cp += n; /* name */
|
|
Packit |
6c4009 |
BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);
|
|
Packit |
6c4009 |
type = ns_get16(cp);
|
|
Packit |
6c4009 |
cp += INT16SZ; /* type */
|
|
Packit |
6c4009 |
class = ns_get16(cp);
|
|
Packit |
6c4009 |
cp += INT16SZ + INT32SZ; /* class, TTL */
|
|
Packit |
6c4009 |
n = ns_get16(cp);
|
|
Packit |
6c4009 |
cp += INT16SZ; /* len */
|
|
Packit |
6c4009 |
BOUNDS_CHECK(cp, n);
|
|
Packit |
6c4009 |
erdata = cp + n;
|
|
Packit |
6c4009 |
if (class != C_IN) {
|
|
Packit |
6c4009 |
/* XXX - debug? syslog? */
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue; /* XXX - had_error++ ? */
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) {
|
|
Packit |
6c4009 |
if (ap >= &host_aliases[MAXALIASES-1])
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
|
|
Packit |
6c4009 |
if ((n < 0) || !(*name_ok)(tbuf)) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
if (cp != erdata) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
/* Store alias. */
|
|
Packit |
6c4009 |
*ap++ = bp;
|
|
Packit |
6c4009 |
n = strlen(bp) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n >= MAXHOSTNAMELEN) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
/* Get canonical name. */
|
|
Packit |
6c4009 |
n = strlen(tbuf) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n > buflen || n >= MAXHOSTNAMELEN) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
strcpy(bp, tbuf);
|
|
Packit |
6c4009 |
host.h_name = bp;
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (qtype == T_PTR && type == T_CNAME) {
|
|
Packit |
6c4009 |
n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
|
|
Packit |
6c4009 |
if (n < 0 || !res_dnok(tbuf)) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
if (cp != erdata) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
/* Get canonical name. */
|
|
Packit |
6c4009 |
n = strlen(tbuf) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n > buflen || n >= MAXHOSTNAMELEN) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
strcpy(bp, tbuf);
|
|
Packit |
6c4009 |
tname = bp;
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (type != qtype) {
|
|
Packit |
6c4009 |
/* Log a low priority message if we get an unexpected
|
|
Packit |
6c4009 |
* record, but skip it if we are using DNSSEC since it
|
|
Packit |
6c4009 |
* uses many different types in responses that do not
|
|
Packit |
6c4009 |
* match QTYPE.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue; /* XXX - had_error++ ? */
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
switch (type) {
|
|
Packit |
6c4009 |
case T_PTR:
|
|
Packit |
6c4009 |
if (strcasecmp(tname, bp) != 0) {
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue; /* XXX - had_error++ ? */
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
n = dn_expand(answer->buf, eom, cp, bp, buflen);
|
|
Packit |
6c4009 |
if ((n < 0) || !res_hnok(bp)) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
if (cp != erdata) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!haveanswer)
|
|
Packit |
6c4009 |
host.h_name = bp;
|
|
Packit |
6c4009 |
else if (ap < &host_aliases[MAXALIASES-1])
|
|
Packit |
6c4009 |
*ap++ = bp;
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
n = -1;
|
|
Packit |
6c4009 |
if (n != -1) {
|
|
Packit |
6c4009 |
n = strlen(bp) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n >= MAXHOSTNAMELEN) {
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
case T_A:
|
|
Packit |
6c4009 |
case T_AAAA:
|
|
Packit |
6c4009 |
if (strcasecmp(host.h_name, bp) != 0) {
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue; /* XXX - had_error++ ? */
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (n != host.h_length) {
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!haveanswer) {
|
|
Packit |
6c4009 |
int nn;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
host.h_name = bp;
|
|
Packit |
6c4009 |
nn = strlen(bp) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
bp += nn;
|
|
Packit |
6c4009 |
buflen -= nn;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* XXX: when incrementing bp, we have to decrement
|
|
Packit |
6c4009 |
* buflen by the same amount --okir */
|
|
Packit |
6c4009 |
buflen -= sizeof(align) - ((u_long)bp % sizeof(align));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
bp += sizeof(align) - ((u_long)bp % sizeof(align));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (bp + n >= &hostbuf[sizeof hostbuf]) {
|
|
Packit |
6c4009 |
Dprintf("size (%d) too big\n", n);
|
|
Packit |
6c4009 |
had_error++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (hap >= &h_addr_ptrs[MAXADDRS-1]) {
|
|
Packit |
6c4009 |
if (!toobig++) {
|
|
Packit |
6c4009 |
Dprintf("Too many addresses (%d)\n",
|
|
Packit |
6c4009 |
MAXADDRS);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
memmove(*hap++ = bp, cp, n);
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
cp += n;
|
|
Packit |
6c4009 |
if (cp != erdata) {
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
default:
|
|
Packit |
6c4009 |
abort();
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!had_error)
|
|
Packit |
6c4009 |
haveanswer++;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (haveanswer) {
|
|
Packit |
6c4009 |
*ap = NULL;
|
|
Packit |
6c4009 |
*hap = NULL;
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* Note: we sort even if host can take only one address
|
|
Packit |
6c4009 |
* in its return structures - should give it the "best"
|
|
Packit |
6c4009 |
* address in that case, not some random one
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
if (_res.nsort && haveanswer > 1 && qtype == T_A)
|
|
Packit |
6c4009 |
addrsort(h_addr_ptrs, haveanswer);
|
|
Packit |
6c4009 |
if (!host.h_name) {
|
|
Packit |
6c4009 |
n = strlen(qname) + 1; /* for the \0 */
|
|
Packit |
6c4009 |
if (n > buflen || n >= MAXHOSTNAMELEN)
|
|
Packit |
6c4009 |
goto no_recovery;
|
|
Packit |
6c4009 |
strcpy(bp, qname);
|
|
Packit |
6c4009 |
host.h_name = bp;
|
|
Packit |
6c4009 |
bp += n;
|
|
Packit |
6c4009 |
buflen -= n;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (res_use_inet6 ())
|
|
Packit |
6c4009 |
map_v4v6_hostent(&host, &bp, &buflen);
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_SUCCESS);
|
|
Packit |
6c4009 |
return (&host);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
no_recovery:
|
|
Packit |
6c4009 |
__set_h_errno (NO_RECOVERY);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
extern struct hostent *res_gethostbyname2(const char *name, int af);
|
|
Packit |
6c4009 |
libresolv_hidden_proto (res_gethostbyname2)
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
res_gethostbyname (const char *name)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct resolv_context *ctx = __resolv_context_get ();
|
|
Packit |
6c4009 |
if (ctx == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (res_use_inet6 ())
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET6);
|
|
Packit |
6c4009 |
if (hp != NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
__resolv_context_put (ctx);
|
|
Packit |
6c4009 |
return hp;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET);
|
|
Packit |
6c4009 |
__resolv_context_put (ctx);
|
|
Packit |
6c4009 |
return hp;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
compat_symbol (libresolv, res_gethostbyname, res_gethostbyname, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static struct hostent *
|
|
Packit |
6c4009 |
res_gethostbyname2_context (struct resolv_context *ctx,
|
|
Packit |
6c4009 |
const char *name, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
union
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
querybuf *buf;
|
|
Packit |
6c4009 |
u_char *ptr;
|
|
Packit |
6c4009 |
} buf;
|
|
Packit |
6c4009 |
querybuf *origbuf;
|
|
Packit |
6c4009 |
const char *cp;
|
|
Packit |
6c4009 |
char *bp;
|
|
Packit |
6c4009 |
int n, size, type, len;
|
|
Packit |
6c4009 |
struct hostent *ret;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
switch (af) {
|
|
Packit |
6c4009 |
case AF_INET:
|
|
Packit |
6c4009 |
size = INADDRSZ;
|
|
Packit |
6c4009 |
type = T_A;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
case AF_INET6:
|
|
Packit |
6c4009 |
size = IN6ADDRSZ;
|
|
Packit |
6c4009 |
type = T_AAAA;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
default:
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
__set_errno (EAFNOSUPPORT);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
host.h_addrtype = af;
|
|
Packit |
6c4009 |
host.h_length = size;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* if there aren't any dots, it could be a user-level alias.
|
|
Packit |
6c4009 |
* this is also done in res_query() since we are not the only
|
|
Packit |
6c4009 |
* function that looks up host names.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
char abuf[MAXDNAME];
|
|
Packit |
6c4009 |
if (strchr (name, '.') != NULL
|
|
Packit |
6c4009 |
&& (cp = __res_context_hostalias (ctx, name, abuf, sizeof (abuf))))
|
|
Packit |
6c4009 |
name = cp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* disallow names consisting only of digits/dots, unless
|
|
Packit |
6c4009 |
* they end in a dot.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
if (isdigit(name[0]))
|
|
Packit |
6c4009 |
for (cp = name;; ++cp) {
|
|
Packit |
6c4009 |
if (!*cp) {
|
|
Packit |
6c4009 |
if (*--cp == '.')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* All-numeric, no dot at the end.
|
|
Packit |
6c4009 |
* Fake up a hostent as if we'd actually
|
|
Packit |
6c4009 |
* done a lookup.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
if (inet_pton(af, name, host_addr) <= 0) {
|
|
Packit |
6c4009 |
__set_h_errno (HOST_NOT_FOUND);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
strncpy(hostbuf, name, MAXDNAME);
|
|
Packit |
6c4009 |
hostbuf[MAXDNAME] = '\0';
|
|
Packit |
6c4009 |
bp = hostbuf + MAXDNAME;
|
|
Packit |
6c4009 |
len = sizeof hostbuf - MAXDNAME;
|
|
Packit |
6c4009 |
host.h_name = hostbuf;
|
|
Packit |
6c4009 |
host.h_aliases = host_aliases;
|
|
Packit |
6c4009 |
host_aliases[0] = NULL;
|
|
Packit |
6c4009 |
h_addr_ptrs[0] = (char *)host_addr;
|
|
Packit |
6c4009 |
h_addr_ptrs[1] = NULL;
|
|
Packit |
6c4009 |
host.h_addr_list = h_addr_ptrs;
|
|
Packit |
6c4009 |
if (res_use_inet6 ())
|
|
Packit |
6c4009 |
map_v4v6_hostent(&host, &bp, &len;;
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_SUCCESS);
|
|
Packit |
6c4009 |
return (&host);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!isdigit(*cp) && *cp != '.')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if ((isxdigit(name[0]) && strchr(name, ':') != NULL) ||
|
|
Packit |
6c4009 |
name[0] == ':')
|
|
Packit |
6c4009 |
for (cp = name;; ++cp) {
|
|
Packit |
6c4009 |
if (!*cp) {
|
|
Packit |
6c4009 |
if (*--cp == '.')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
/*
|
|
Packit |
6c4009 |
* All-IPv6-legal, no dot at the end.
|
|
Packit |
6c4009 |
* Fake up a hostent as if we'd actually
|
|
Packit |
6c4009 |
* done a lookup.
|
|
Packit |
6c4009 |
*/
|
|
Packit |
6c4009 |
if (inet_pton(af, name, host_addr) <= 0) {
|
|
Packit |
6c4009 |
__set_h_errno (HOST_NOT_FOUND);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
strncpy(hostbuf, name, MAXDNAME);
|
|
Packit |
6c4009 |
hostbuf[MAXDNAME] = '\0';
|
|
Packit |
6c4009 |
bp = hostbuf + MAXDNAME;
|
|
Packit |
6c4009 |
len = sizeof hostbuf - MAXDNAME;
|
|
Packit |
6c4009 |
host.h_name = hostbuf;
|
|
Packit |
6c4009 |
host.h_aliases = host_aliases;
|
|
Packit |
6c4009 |
host_aliases[0] = NULL;
|
|
Packit |
6c4009 |
h_addr_ptrs[0] = (char *)host_addr;
|
|
Packit |
6c4009 |
h_addr_ptrs[1] = NULL;
|
|
Packit |
6c4009 |
host.h_addr_list = h_addr_ptrs;
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_SUCCESS);
|
|
Packit |
6c4009 |
return (&host);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!isxdigit(*cp) && *cp != ':' && *cp != '.')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
buf.buf = origbuf = (querybuf *) alloca (1024);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if ((n = __res_context_search
|
|
Packit |
6c4009 |
(ctx, name, C_IN, type, buf.buf->buf, 1024,
|
|
Packit |
6c4009 |
&buf.ptr, NULL, NULL, NULL, NULL)) < 0) {
|
|
Packit |
6c4009 |
if (buf.buf != origbuf)
|
|
Packit |
6c4009 |
free (buf.buf);
|
|
Packit |
6c4009 |
Dprintf("res_nsearch failed (%d)\n", n);
|
|
Packit |
6c4009 |
if (errno == ECONNREFUSED)
|
|
Packit |
6c4009 |
return (_gethtbyname2(name, af));
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
ret = getanswer(buf.buf, n, name, type);
|
|
Packit |
6c4009 |
if (buf.buf != origbuf)
|
|
Packit |
6c4009 |
free (buf.buf);
|
|
Packit |
6c4009 |
return ret;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
res_gethostbyname2 (const char *name, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct resolv_context *ctx = __resolv_context_get ();
|
|
Packit |
6c4009 |
if (ctx == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET);
|
|
Packit |
6c4009 |
__resolv_context_put (ctx);
|
|
Packit |
6c4009 |
return hp;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libresolv_hidden_def (res_gethostbyname2)
|
|
Packit |
6c4009 |
compat_symbol (libresolv, res_gethostbyname2, res_gethostbyname2, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static struct hostent *
|
|
Packit |
6c4009 |
res_gethostbyaddr_context (struct resolv_context *ctx,
|
|
Packit |
6c4009 |
const void *addr, socklen_t len, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
const u_char *uaddr = (const u_char *)addr;
|
|
Packit |
6c4009 |
static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
|
|
Packit |
6c4009 |
static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
|
|
Packit |
6c4009 |
int n;
|
|
Packit |
6c4009 |
socklen_t size;
|
|
Packit |
6c4009 |
union
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
querybuf *buf;
|
|
Packit |
6c4009 |
u_char *ptr;
|
|
Packit |
6c4009 |
} buf;
|
|
Packit |
6c4009 |
querybuf *orig_buf;
|
|
Packit |
6c4009 |
struct hostent *hp;
|
|
Packit |
6c4009 |
char qbuf[MAXDNAME+1], *qp = NULL;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (af == AF_INET6 && len == IN6ADDRSZ &&
|
|
Packit |
6c4009 |
(!memcmp(uaddr, mapped, sizeof mapped) ||
|
|
Packit |
6c4009 |
!memcmp(uaddr, tunnelled, sizeof tunnelled))) {
|
|
Packit |
6c4009 |
/* Unmap. */
|
|
Packit |
6c4009 |
addr += sizeof mapped;
|
|
Packit |
6c4009 |
uaddr += sizeof mapped;
|
|
Packit |
6c4009 |
af = AF_INET;
|
|
Packit |
6c4009 |
len = INADDRSZ;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
switch (af) {
|
|
Packit |
6c4009 |
case AF_INET:
|
|
Packit |
6c4009 |
size = INADDRSZ;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
case AF_INET6:
|
|
Packit |
6c4009 |
size = IN6ADDRSZ;
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
default:
|
|
Packit |
6c4009 |
__set_errno (EAFNOSUPPORT);
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (size != len) {
|
|
Packit |
6c4009 |
__set_errno (EINVAL);
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
switch (af) {
|
|
Packit |
6c4009 |
case AF_INET:
|
|
Packit |
6c4009 |
(void) sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
|
|
Packit |
6c4009 |
(uaddr[3] & 0xff),
|
|
Packit |
6c4009 |
(uaddr[2] & 0xff),
|
|
Packit |
6c4009 |
(uaddr[1] & 0xff),
|
|
Packit |
6c4009 |
(uaddr[0] & 0xff));
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
case AF_INET6:
|
|
Packit |
6c4009 |
qp = qbuf;
|
|
Packit |
6c4009 |
for (n = IN6ADDRSZ - 1; n >= 0; n--) {
|
|
Packit |
6c4009 |
qp += sprintf(qp, "%x.%x.",
|
|
Packit |
6c4009 |
uaddr[n] & 0xf,
|
|
Packit |
6c4009 |
(uaddr[n] >> 4) & 0xf);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
strcpy(qp, "ip6.arpa");
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
default:
|
|
Packit |
6c4009 |
abort();
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
buf.buf = orig_buf = (querybuf *) alloca (1024);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
n = __res_context_query (ctx, qbuf, C_IN, T_PTR, buf.buf->buf, 1024,
|
|
Packit |
6c4009 |
&buf.ptr, NULL, NULL, NULL, NULL);
|
|
Packit |
6c4009 |
if (n < 0) {
|
|
Packit |
6c4009 |
if (buf.buf != orig_buf)
|
|
Packit |
6c4009 |
free (buf.buf);
|
|
Packit |
6c4009 |
Dprintf("res_nquery failed (%d)\n", n);
|
|
Packit |
6c4009 |
if (errno == ECONNREFUSED)
|
|
Packit |
6c4009 |
return (_gethtbyaddr(addr, len, af));
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
hp = getanswer(buf.buf, n, qbuf, T_PTR);
|
|
Packit |
6c4009 |
if (buf.buf != orig_buf)
|
|
Packit |
6c4009 |
free (buf.buf);
|
|
Packit |
6c4009 |
if (!hp)
|
|
Packit |
6c4009 |
return (NULL); /* h_errno was set by getanswer() */
|
|
Packit |
6c4009 |
hp->h_addrtype = af;
|
|
Packit |
6c4009 |
hp->h_length = len;
|
|
Packit |
6c4009 |
memmove(host_addr, addr, len);
|
|
Packit |
6c4009 |
h_addr_ptrs[0] = (char *)host_addr;
|
|
Packit |
6c4009 |
h_addr_ptrs[1] = NULL;
|
|
Packit |
6c4009 |
if (af == AF_INET && res_use_inet6 ()) {
|
|
Packit |
6c4009 |
map_v4v6_address((char*)host_addr, (char*)host_addr);
|
|
Packit |
6c4009 |
hp->h_addrtype = AF_INET6;
|
|
Packit |
6c4009 |
hp->h_length = IN6ADDRSZ;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_SUCCESS);
|
|
Packit |
6c4009 |
return (hp);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
res_gethostbyaddr (const void *addr, socklen_t len, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct resolv_context *ctx = __resolv_context_get ();
|
|
Packit |
6c4009 |
if (ctx == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
struct hostent *hp = res_gethostbyaddr_context (ctx, addr, len, af);
|
|
Packit |
6c4009 |
__resolv_context_put (ctx);
|
|
Packit |
6c4009 |
return hp;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
compat_symbol (libresolv, res_gethostbyaddr, res_gethostbyaddr, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
void
|
|
Packit |
6c4009 |
_sethtent (int f)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (!hostf)
|
|
Packit |
6c4009 |
hostf = fopen(_PATH_HOSTS, "rce" );
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
rewind(hostf);
|
|
Packit |
6c4009 |
stayopen = f;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libresolv_hidden_def (_sethtent)
|
|
Packit |
6c4009 |
compat_symbol (libresolv, _sethtent, _sethtent, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
_endhtent (void)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (hostf && !stayopen) {
|
|
Packit |
6c4009 |
(void) fclose(hostf);
|
|
Packit |
6c4009 |
hostf = NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
_gethtent (void)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
char *p;
|
|
Packit |
6c4009 |
char *cp, **q;
|
|
Packit |
6c4009 |
int af, len;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (!hostf && !(hostf = fopen(_PATH_HOSTS, "rce" ))) {
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_INTERNAL);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
again:
|
|
Packit |
6c4009 |
if (!(p = fgets(hostbuf, sizeof hostbuf, hostf))) {
|
|
Packit |
6c4009 |
__set_h_errno (HOST_NOT_FOUND);
|
|
Packit |
6c4009 |
return (NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (*p == '#')
|
|
Packit |
6c4009 |
goto again;
|
|
Packit |
6c4009 |
if (!(cp = strpbrk(p, "#\n")))
|
|
Packit |
6c4009 |
goto again;
|
|
Packit |
6c4009 |
*cp = '\0';
|
|
Packit |
6c4009 |
if (!(cp = strpbrk(p, " \t")))
|
|
Packit |
6c4009 |
goto again;
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
if (inet_pton(AF_INET6, p, host_addr) > 0) {
|
|
Packit |
6c4009 |
af = AF_INET6;
|
|
Packit |
6c4009 |
len = IN6ADDRSZ;
|
|
Packit |
6c4009 |
} else if (inet_pton(AF_INET, p, host_addr) > 0) {
|
|
Packit |
6c4009 |
if (res_use_inet6 ()) {
|
|
Packit |
6c4009 |
map_v4v6_address((char*)host_addr, (char*)host_addr);
|
|
Packit |
6c4009 |
af = AF_INET6;
|
|
Packit |
6c4009 |
len = IN6ADDRSZ;
|
|
Packit |
6c4009 |
} else {
|
|
Packit |
6c4009 |
af = AF_INET;
|
|
Packit |
6c4009 |
len = INADDRSZ;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
} else {
|
|
Packit |
6c4009 |
goto again;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
h_addr_ptrs[0] = (char *)host_addr;
|
|
Packit |
6c4009 |
h_addr_ptrs[1] = NULL;
|
|
Packit |
6c4009 |
host.h_addr_list = h_addr_ptrs;
|
|
Packit |
6c4009 |
host.h_length = len;
|
|
Packit |
6c4009 |
host.h_addrtype = af;
|
|
Packit |
6c4009 |
while (*cp == ' ' || *cp == '\t')
|
|
Packit |
6c4009 |
cp++;
|
|
Packit |
6c4009 |
host.h_name = cp;
|
|
Packit |
6c4009 |
q = host.h_aliases = host_aliases;
|
|
Packit |
6c4009 |
if ((cp = strpbrk(cp, " \t")))
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
while (cp && *cp) {
|
|
Packit |
6c4009 |
if (*cp == ' ' || *cp == '\t') {
|
|
Packit |
6c4009 |
cp++;
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (q < &host_aliases[MAXALIASES - 1])
|
|
Packit |
6c4009 |
*q++ = cp;
|
|
Packit |
6c4009 |
if ((cp = strpbrk(cp, " \t")))
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
*q = NULL;
|
|
Packit |
6c4009 |
__set_h_errno (NETDB_SUCCESS);
|
|
Packit |
6c4009 |
return (&host);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libresolv_hidden_def (_gethtent)
|
|
Packit |
6c4009 |
compat_symbol (libresolv, _gethtent, _gethtent, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
_gethtbyname (const char *name)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct hostent *hp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (res_use_inet6 ()) {
|
|
Packit |
6c4009 |
hp = _gethtbyname2(name, AF_INET6);
|
|
Packit |
6c4009 |
if (hp)
|
|
Packit |
6c4009 |
return (hp);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
return (_gethtbyname2(name, AF_INET));
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
compat_symbol (libresolv, _gethtbyname, _gethtbyname, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
_gethtbyname2 (const char *name, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct hostent *p;
|
|
Packit |
6c4009 |
char **cp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
_sethtent(0);
|
|
Packit |
6c4009 |
while ((p = _gethtent())) {
|
|
Packit |
6c4009 |
if (p->h_addrtype != af)
|
|
Packit |
6c4009 |
continue;
|
|
Packit |
6c4009 |
if (strcasecmp(p->h_name, name) == 0)
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
for (cp = p->h_aliases; *cp != 0; cp++)
|
|
Packit |
6c4009 |
if (strcasecmp(*cp, name) == 0)
|
|
Packit |
6c4009 |
goto found;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
found:
|
|
Packit |
6c4009 |
_endhtent();
|
|
Packit |
6c4009 |
return (p);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libresolv_hidden_def (_gethtbyname2)
|
|
Packit |
6c4009 |
compat_symbol (libresolv, _gethtbyname2, _gethtbyname2, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
struct hostent *
|
|
Packit |
6c4009 |
_gethtbyaddr (const char *addr, size_t len, int af)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct hostent *p;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
_sethtent(0);
|
|
Packit |
6c4009 |
while ((p = _gethtent()))
|
|
Packit |
6c4009 |
if (p->h_addrtype == af && !memcmp(p->h_addr, addr, len))
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
_endhtent();
|
|
Packit |
6c4009 |
return (p);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libresolv_hidden_def (_gethtbyaddr)
|
|
Packit |
6c4009 |
compat_symbol (libresolv, _gethtbyaddr, _gethtbyaddr, GLIBC_2_0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
map_v4v6_address (const char *src, char *dst)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
u_char *p = (u_char *)dst;
|
|
Packit |
6c4009 |
char tmp[INADDRSZ];
|
|
Packit |
6c4009 |
int i;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Stash a temporary copy so our caller can update in place. */
|
|
Packit |
6c4009 |
memcpy(tmp, src, INADDRSZ);
|
|
Packit |
6c4009 |
/* Mark this ipv6 addr as a mapped ipv4. */
|
|
Packit |
6c4009 |
for (i = 0; i < 10; i++)
|
|
Packit |
6c4009 |
*p++ = 0x00;
|
|
Packit |
6c4009 |
*p++ = 0xff;
|
|
Packit |
6c4009 |
*p++ = 0xff;
|
|
Packit |
6c4009 |
/* Retrieve the saved copy and we're done. */
|
|
Packit |
6c4009 |
memcpy((void*)p, tmp, INADDRSZ);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static void
|
|
Packit |
6c4009 |
map_v4v6_hostent (struct hostent *hp, char **bpp, int *lenp)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
char **ap;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ)
|
|
Packit |
6c4009 |
return;
|
|
Packit |
6c4009 |
hp->h_addrtype = AF_INET6;
|
|
Packit |
6c4009 |
hp->h_length = IN6ADDRSZ;
|
|
Packit |
6c4009 |
for (ap = hp->h_addr_list; *ap; ap++) {
|
|
Packit |
6c4009 |
int i = sizeof(align) - ((u_long)*bpp % sizeof(align));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (*lenp < (i + IN6ADDRSZ)) {
|
|
Packit |
6c4009 |
/* Out of memory. Truncate address list here. XXX */
|
|
Packit |
6c4009 |
*ap = NULL;
|
|
Packit |
6c4009 |
return;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
*bpp += i;
|
|
Packit |
6c4009 |
*lenp -= i;
|
|
Packit |
6c4009 |
map_v4v6_address(*ap, *bpp);
|
|
Packit |
6c4009 |
*ap = *bpp;
|
|
Packit |
6c4009 |
*bpp += IN6ADDRSZ;
|
|
Packit |
6c4009 |
*lenp -= IN6ADDRSZ;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
extern void
|
|
Packit |
6c4009 |
addrsort (char **ap, int num)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
int i, j;
|
|
Packit |
6c4009 |
char **p;
|
|
Packit |
6c4009 |
short aval[MAXADDRS];
|
|
Packit |
6c4009 |
int needsort = 0;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
p = ap;
|
|
Packit |
6c4009 |
for (i = 0; i < num; i++, p++) {
|
|
Packit |
6c4009 |
for (j = 0 ; (unsigned)j < _res.nsort; j++)
|
|
Packit |
6c4009 |
if (_res.sort_list[j].addr.s_addr ==
|
|
Packit |
6c4009 |
(((struct in_addr *)(*p))->s_addr & _res.sort_list[j].mask))
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
aval[i] = j;
|
|
Packit |
6c4009 |
if (needsort == 0 && i > 0 && j < aval[i-1])
|
|
Packit |
6c4009 |
needsort = i;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!needsort)
|
|
Packit |
6c4009 |
return;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
while (needsort < num) {
|
|
Packit |
6c4009 |
for (j = needsort - 1; j >= 0; j--) {
|
|
Packit |
6c4009 |
if (aval[j] > aval[j+1]) {
|
|
Packit |
6c4009 |
char *hp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
i = aval[j];
|
|
Packit |
6c4009 |
aval[j] = aval[j+1];
|
|
Packit |
6c4009 |
aval[j+1] = i;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
hp = ap[j];
|
|
Packit |
6c4009 |
ap[j] = ap[j+1];
|
|
Packit |
6c4009 |
ap[j+1] = hp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
} else
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
needsort++;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_25) */
|